Armature



(No Model.)

J. JQSMITH & G. w. PINDLATER. ARMATURE.

No. 501,376. Patented July 11,1893.

Fig/2.

a WITNESSES: j; INVENTORS W66 J1 fig Z1 A77'0RNEYS.

UNITED STATES PATENT OFFICE.

JOSEPH J. SMITH AND GEORGE XV. FINDLATER, OF JAMAICA, NEW YORK.

ARMATU RE.

SPECIFICATION forming part of Letters Patent No. 501,376, dated July 11, 1893.

Application filed May 26, 1892. Serial No. 434,443. (No model.)

To all whom it may concern.-

Be it known that we, JOSEPH J. SMITH and GEORGE W. FINDLATEE, both of Jamaica, in the county of Queens and State of New York, have invented a new and Improved Arma ture, of which the following is a full, clear, and exact description.

Our invention relates to improvements in armatures such as are used in elcctro motors or dynamos, and the object of our invention is to produce a cheap and simple form of armature which will be as eflicient as any armature in use, and which is made up of a series of easily removable sections or bobbins, each carrging a coil, and which also is provided with a convenient means of connecting and disconnecting the several coils so that in case one is burned outitmay be easily removed and another one inserted in its place.

To this end our invention consists in an armature, the construction of which will be hereinafter described and claimed.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar figures of reference indicate corresponding parts in all the views.

Figure 1 is a sectional end view of an armature embodying our invention, with a part of the commutator broken away and with a portion of the bobbins or removable sections wound and a portion unwound. Fig. 2 is a broken side elevation of the same. Fig. 3 is a detail end view of one of the removable sections or bobbins. Fig. 4 is a plan of the same. Fig. 5 is an enlarged detail front elevation of one of the fastening washers which holds the bobbins in place; and Fig. 6 is a cross section on the line 6-6 in Fig. 5.

The armature has a ring 10, which is substantially like the well known Gram me ring, and this ring has the usual spokes 11, which are secured to a hub 12 carried by the armature shaft 13, and the shaft has at one end of the armature a common form of commutator 14. On the outer face of the ring are radially-extending arms 15, four being shown in the drawings, although a greater or less number may be used, and these have at their ends metallic bands 16 and 16, which serve to bind the removable bobbins in place. The band 16 is a plain ring beneath which the bobbins may be pushed, and the band 16 is of angular cross section having an end flange 17 against which one end of each bobbin abuts.

The bobbins 1S consist of radially parallel plates 19, which are placed far enough apart to permit a coil of the right size to be wound between them, and these plates are connected by a central core 20, space being left between the plates at the ends of the core and above and beneath the latter to permit the necessary winding. One of the plates 19 has a longitudinal groove 21 onits outer side, and the opposite arm has a corresponding tongue 22, so that when the bobbins are in place in the armature, the tongue of one may fit into the groove of the next and the whole series be held firmly together. The arms 15 of the ring 10 are similarly arranged, each arm having on one side a groove 21, and on the other side a tongue 22, so that the tongue on one of the bobbins may fit the recess of one of the arms, and the tongue on the arm may fit acorresponding groove on one of the bobbin plates.

The bobbin plates 19 have dovetailed feet 23, which fit corresponding grooves 23 in the outer face of the ring 10, and this arrangement enables the bobbins to be slid lengthwise into place around the ring, the inward movement of the bobbins being limited by the flange 17 of the band 16. After the bobbins are inserted they are held in place by washers 24, the washers being arranged so that each washer will come opposite two adjacent feet of the abutting bobbins. Each washer 24 is pivoted on a screw 25 or its equivalent, and the washer has one flattened edge 26, which when turned beneath the feet 23, will clear the groove 23, so as to permit the insertion or removal of the feet. The washer has also side notches 27, which are adapted to receive the free end of a spring 28, which is secured to the end of the ring 10 adjacent to the washers, and which serves to fasten the washer so that it will not turn. When the bobbins have been inserted, the washers are turned up so as to overlap the ends of the feet 23, and the washers are held in place by the springs 28, in the manner described.

The bobbins are wound in the usual way,

and the connections between the bobbins and between the bobbins and the commutator are made by means of the couplings 29,although any convenient means may be employed. As shown in the drawings, the ends 30 of the wire on two adjacent bobbins are inserted in a perforation in the coupling 29, and held in place by a binding screw 31. Each coupling has also a wire 32, held therein by a binding screw, and this wire connects with one of the sections of the commutator 14 in the usual way, and is held in place by a binding screw 33. It will be seen that this makes a series wound armature, and when a coil or bobbin is to be removed, it is only necessary to loosen one of the screws in the coupling 29, thus disconnecting the wires 30, and the connection may be as easily made.

The bobbins are Wound before being inserted in the armature, and they are then pushed to place side by side, thus forming practically a solid armature as the bobbins are tongued and grooved together, and they are quickly fastened in place in the manner described.

WVe have shown a particular means of fastening the bobbins together and of securing them in the ring 10; also a particular means for connecting the wires with the commutator, and the mechanism shown for accomplishing these results is believed to be the most efficient and convenient; but it will be understood that these details may be changed without departing from the principle of our invention.

Having thus described our invention, we claim as new and desire to secure by Letters Patent 1. An armature, comprising a central ring having radially-extending arms, circumferential bands carried by the arms, one of the bands having an end flange, and a series of removable bobbins held between the arms and within the band, the bobbins having their feet dovetailed into the ring, substantially as described.

2. An armature, comprisinga central ring having radially-extending arms, circumferential bands carried at the ends of the arms, one of the bands having an end flange, and a series of removable bobbins tongued and grooved together and dovetailed into the ring, substantially as described.

3. The combination of the ring, the removable bobbins dovetailed into the ring, the revoluble washers pivoted on the ring so as to overlap the feet of the bobbins, the washers having one flat edge, and a fastening device to secure the washers, substantially as described.

JOSEPH J. SMITH. GEORGE \V. FINDLATEB Witnesses:

Jos. GERMAN, ALEXANDER LEVY. 

